Aroma diffuser



FIG. 1 is a front elevational view of an aroma diffuser showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is a bottom and rear perspective view thereof;

FIG. 9 is an enlarged view of portion 9 in FIG. 2; and,

FIG. 10 is an enlarged view of portion 10 in FIG. 7.

The broken lines in the drawings illustrate portions of the aroma diffuser which form no part of the claimed design. 

CLAIM The ornamental design for an aroma diffuser, as shown and described. 